Final answer:
Tunnel vision occurs when certain possibilities for the patient's condition are excluded, limiting focus to a single perspective. In a clinical context, it can also refer to loss of peripheral vision, with only central vision remaining, such as with bilateral hemianopia. Clinically speaking, tunnel vision can also refer to a physical condition where peripheral vision is lost, leaving only the central vision intact, such as in cases of bilateral hemianopia due to a pituitary gland pressing against the optic chiasm.
Step-by-step explanation:
Tunnel vision occurs when you exclude certain possibilities for the patient's condition. This term typically relates to a perceptual or cognitive state where one's focus is limited to a single point of view or a narrow range of perspectives, often leading to oversight or neglect of other possibilities. Clinically speaking, tunnel vision can also refer to a physical condition where peripheral vision is lost, leaving only the central vision intact, such as in cases of bilateral hemianopia due to a pituitary gland pressing against the optic chiasm.